おまけ

meanについて

公式ドキュメント

docstring

Return the mean of the values for the requested axis
Parameters
----------
axis : {index (0), columns (1)}
skipna : boolean, default True
Exclude NA/null values when computing the result.
level : int or level name, default None
If the axis is a MultiIndex (hierarchical), count along a
particular level, collapsing into a Series
numeric_only : boolean, default None
Include only float, int, boolean columns. If None, will attempt to use
everything, then use only numeric data. Not implemented for Series.
Returns
-------
mean : Series or DataFrame (if level specified)

medianについて

公式ドキュメント

docstring

Return the median of the values for the requested axis
Parameters
----------
axis : {index (0), columns (1)}
skipna : boolean, default True
Exclude NA/null values when computing the result.
level : int or level name, default None
If the axis is a MultiIndex (hierarchical), count along a
particular level, collapsing into a Series
numeric_only : boolean, default None
Include only float, int, boolean columns. If None, will attempt to use
everything, then use only numeric data. Not implemented for Series.
Returns
-------
median : Series or DataFrame (if level specified)